JP2018066712A - Measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring device advantageous in terms of operability.SOLUTION: A measuring device including a casing with an opening formed thereon for measuring a reflection characteristic of a face via the opening includes: an imaging unit provided within the casing for taking an image of the face via the opening; a detection unit for detecting reflection light from the face at part of a region photographed with the imaging unit; a processing unit for obtaining the reflection characteristic of the face at the part on the basis of detection by the detection unit; and a display unit for displaying an image of the region obtained by the imaging unit. The image of the region which is displayed by the display unit includes information indicating the part of the region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a measuring device that measures reflection characteristics of a surface.

  For evaluation of surfaces such as a printed surface, a painted surface, and a product outer surface, reflection characteristics such as color, gloss, diffusion, and cloudiness defined by JIS and ISO are used as indices. In order to measure such reflection characteristics, a measuring apparatus is known that includes a light source that irradiates light to a surface to be measured and a sensor that detects light reflected by the surface to be measured (see Patent Document 1). ).

JP 2006-30203 A

  The above-described reflection characteristic measuring apparatus preferably performs measurement in a state where external light is blocked by the housing. However, since the measuring device cannot visually recognize the region where the reflection characteristic is measured in such a state, it is difficult to relatively position the target region where the reflection property is to be measured and the measuring device. It was disadvantageous in terms of operability.

  An object of the present invention is to provide a measuring device that is advantageous in terms of operability.

  In order to achieve the above object, a measuring apparatus according to one aspect of the present invention includes a housing in which an opening is formed, and is a measuring apparatus that measures reflection characteristics of a surface through the opening. An imaging unit that is provided in the housing and captures the surface through the opening, a detection unit that detects reflected light from the surface in a part of an area captured by the imaging unit, and the detection A processing unit that obtains reflection characteristics of the surface in the part based on detection by the unit, and a display unit that displays an image of the region obtained by the imaging unit, and is displayed by the display unit The image of the region includes information indicating the part of the region.

  Further objects and other aspects of the present invention will become apparent from the preferred embodiments described below with reference to the accompanying drawings.

  According to the present invention, for example, a measuring device that is advantageous in terms of operability can be provided.

It is an external view of a measuring device. It is the figure which looked at the internal structure of the measuring device from the Y direction. It is the figure which looked at the internal structure of the measuring device from the X direction. It is a figure which shows the image of a 2nd partial area | region. It is a flowchart which shows the method of measuring the reflective characteristic of a to-be-measured surface. It is a figure which shows the image of a 2nd partial area | region. It is a figure which shows the image of a 2nd partial area | region. It is a figure which shows the image of a 2nd partial area | region.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same reference number is attached | subjected about the same member thru | or element, and the overlapping description is abbreviate | omitted.

<First Embodiment>
A measuring apparatus 10 according to this embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external view of a measuring device 10 according to the present embodiment, FIG. 2 is a view of the internal configuration of the measuring device 10 viewed from the Y direction, and FIG. 3 illustrates the internal configuration of the measuring device 10 in the X direction. It is the figure seen from. The measurement apparatus 10 includes, for example, a housing 11, a detection unit 12, an imaging unit 13, a display unit 14, an operation unit 15 (input unit), and a control unit 16. The reflection characteristics of the measurement target surface 20 are measured through the 11 openings 17. Here, the reflection characteristic may include at least one of specular gloss, haze, DOI (Distinctness of Image), and image clarity. The control unit 16 includes, for example, an MCU (Micro Controller Unit) having a CPU, a memory (storage unit), and the like, and controls each unit of the measurement apparatus 10. Here, in the measurement apparatus 10 of the present embodiment, the control unit 16 has a function as a processing unit that obtains the reflection characteristics of the measurement target surface 20 (first partial region 21) based on the detection result of the detection unit 12. However, the present invention is not limited to this, and the processing unit may be provided separately from the control unit 16. The control unit 16 may include a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or the like instead of the MCU (or in addition to the MCU).

  The housing 11 has, for example, a first surface 11a in which an opening 17 is formed, a second surface 11b opposite to the first surface 11a, and a side surface 11c, and the first surface 11a is on the measured surface side. So that the first surface 11a faces the surface to be measured. In the housing, a detection unit 12, an imaging unit 13, and a control unit 16 are provided. On the second surface 11b of the housing 11, a display unit 14 (display 14a) and an operation unit 15 (button group) are provided. It is preferable in terms of operability that the display unit 14 and the operation unit 15 are provided adjacent to each other on the housing (second surface 11b). Further, the side surface 11c of the housing 11 is formed with a concave portion 11d (gripping portion) for easily catching and gripping a user's finger. Here, the concave portion 11d (gripping portion) and the operating portion 15 are provided on the casing 11 so that the user can operate the operating portion 15 (button group) while gripping the side surface 11c (concave portion 11d) of the casing 11. It is good to be provided (arranged). It can be said that the concave portion 11d and the operation portion 15 arranged in this manner are provided adjacent to each other on the housing.

  The detection unit 12 emits light to the first partial region 21 (part of the region of the measured surface 20 imaged by the imaging unit 13 described later) in the region of the measured surface 20 where the opening 17 of the housing 11 is located. , And the light reflected by the first partial region 21 is detected. The detection unit 12 may include, for example, an irradiation unit that irradiates light to the first partial region 21 and a light receiving unit that receives light reflected by the first partial region 21. The irradiation unit includes a light source 12a and a lens 12b, and irradiates the first partial region 21 with light. The light source 12a is connected to the light source control circuit 12c, and the light emission intensity is adjusted according to a signal sent from the control unit 16 to the light source control circuit 12c. The light emitted from the light source 12 a is collimated by the lens 12 b (collimated) and enters the first partial region 21. The light receiving unit includes a sensor 12d and a lens 12e, and receives (detects) light reflected by the first partial region 21. The sensor 12d includes, for example, an area sensor in which photoelectric conversion elements composed of a CCD, a CMOS, or the like are two-dimensionally arranged, and receives light reflected by the first partial region 21 and collected by the lens 12e. Thus, the intensity distribution of the reflected light from the first partial region 21 is detected. Thereby, the control part 16 (processing part) can obtain | require the reflection characteristic of the 1st partial area 21 based on the intensity distribution data (detection result in the detection part 12) of the reflected light output from the sensor 12d. .

  A value (standard value) indicating the reflection characteristic of the first partial region 21 obtained by the control unit 16 (processing unit) is displayed by the display unit 14. The display unit 14 includes, for example, a display 14a such as an LCD provided on the second surface 11b of the housing 11, and displays a value indicating the reflection characteristic of the first partial region 21 on the display 14a. Thereby, the user can visually recognize the reflection characteristics of the first partial region 21. Various settings such as operation conditions of the measuring apparatus 10 are performed by the user operating the operation unit 15. The operation unit 15 includes a plurality of buttons provided on the second surface 11 b of the housing 11. For example, the control unit 16 detects a signal (a signal input by the operation unit 15) generated when the user presses the button 15 a among the plurality of buttons of the operation unit 15, thereby measuring the measurement target surface 20. The measurement of the reflection characteristics of is started. The operation unit 15 of the present embodiment has a plurality of buttons, but is not limited thereto. For example, the display 14a of the display unit 14 may be a touch panel type, and the display 14a may be used as the operation unit 15.

  Here, the incident angle θ of light incident on the measurement target surface 20 when measuring the reflection characteristics of the measurement target surface 20 (the reflection angle θ ′ of light reflected on the measurement target surface 20) is in accordance with JIS, ISO, or the like. Stipulated for each reflection characteristic standard. For example, when the specular gloss is measured as the reflection characteristic, the incident angle θ (reflection angle θ ′) is defined as any one of 20 degrees, 45 degrees, 60 degrees, 75 degrees, and 85 degrees. In the case where haze is measured as the reflection characteristic, the incident angle θ (reflection angle θ ′) is defined as either 20 degrees or 30 degrees. In the case of measuring the image clarity as the reflection characteristic, the incident angle θ (reflection angle θ ′) is defined as either 45 degrees or 60 degrees. In the case where DOI is measured as the reflection characteristic, the incident angle θ (reflection angle θ ′) is defined as either 20 degrees or 30 degrees.

  In the measurement apparatus 10 (example shown in FIG. 2) of the present embodiment, one detection unit 12 is provided, and the reflection characteristics of the measurement target surface 20 are measured at one type of incident angle θ (reflection angle θ ′). ing. However, as described above, the incident angle θ (reflection angle θ ′) is defined for each reflection characteristic standard. Therefore, a plurality of detection units 12 having different incident angles θ (reflection angles θ ′) are measured so that the reflection characteristics of the measurement target surface 20 can be measured at a plurality of types of incident angles θ (reflection angles θ ′). You may provide in the apparatus 10. FIG. For example, when the detection unit 12 having an incident angle θ (reflection angle θ ′) of 20 degrees and the detection unit 12 having an incident angle θ (reflection angle θ ′) of 60 degrees are provided in the measuring apparatus 10, the specular glossiness is increased. , Haze, image clarity, and DOI can all be measured. Moreover, it is not restricted to providing the some detection part 12, The measurement part 10 has the drive part which drives the said detection part 12 so that incident angle (theta) (reflection angle (theta) ') in one detection part 12 can be changed. May be provided.

  As described above, the measurement of the reflection characteristics is performed in a state in which the external light is blocked by the casing 11, and thus the measurement area in which the reflection characteristics are measured (first partial area 21 in which the detection unit 12 detects the reflected light) Cannot be seen. Therefore, it is difficult for the conventional measurement device to accurately position the measurement device (relative positioning of the target region and the measurement device) so that the measurement region is arranged in the target region where the reflection characteristics are to be measured. It was. Therefore, the measurement apparatus 10 according to the present embodiment includes the imaging unit 13 that images the measurement target surface 20 through the opening 17 of the housing 11. Specifically, the imaging unit 13 images the second partial region 22 including the first partial region 21 in the region of the measurement target surface 20 where the opening 17 of the housing 11 is located. Then, the image of the second partial region 22 obtained by the imaging unit 13 is displayed on the display unit 14 (display 14a). In addition, the image of the second partial region 22 displayed on the display unit 14 includes information indicating the first partial region 21 (position) in the second partial region 22. Thereby, since the user can visually recognize not only the measurement area but also the periphery thereof on the display unit 14, the measurement apparatus 10 can be easily and accurately positioned so that the measurement area is arranged in the target area. it can. Here, the second partial region 22 includes the first partial region 21 and is larger than the first partial region 21 (large in area), and may be smaller than the opening 17 or the same size as the opening 17. It may be. Hereinafter, information indicating the position of the first partial region 21 in the second partial region 22 is referred to as “position information of the first partial region 21”.

Below, the structure of the imaging part 13 of this embodiment and the method of measuring the reflective characteristic of the to-be-measured surface 20 using the measuring apparatus 10 of this embodiment are demonstrated.
First, the configuration of the imaging unit 13 will be described. As illustrated in FIG. 3, the imaging unit 13 includes, for example, a light source 13 a that irradiates light to the second partial region 22 and a camera 13 b that images the second partial region 22 irradiated with light. In the present embodiment, the light source 13a and the camera 13b are arranged so that the second partial region 22 is irradiated with light obliquely and the second partial region 22 is imaged obliquely. Specifically, the angle at which the light source 13a is arranged so that the angle (illumination angle α) at which the principal ray of the light from the light source 13a enters the second partial region 22 is 60 degrees, and the second partial region 22 is imaged. The camera 13b is arranged so that (imaging angle β) is 45 degrees. That is, the light source 13a and the camera 13b are arranged so that the imaging angle β is smaller than the illumination angle α. Although the illumination angle α and the imaging angle β can be set arbitrarily, such an arrangement of the light source 13a and the camera 13b is advantageous when the space in the housing is narrow. If the space in the housing is wide and does not interfere with the housing 11, the light source 13a and the camera 13b are arranged so that the second partial region 22 is irradiated with light from above and the second partial region 22 is imaged from above. You can also.

  The light source 13a irradiates the second partial region 22 with light (illuminates the second partial region 22). The light source 13a is connected to the light source control circuit 13c, and the light emission intensity can be adjusted according to a signal sent from the control unit 16 to the light source control circuit 13c. The light source 13a has a directivity characteristic of an angle γ or more so that light is emitted to the entire second partial region 22 determined according to the angle of view of the camera 13b and the arrangement of the camera 13b with respect to the opening 17. A light source (such as an LED) is preferably used. The light source 13a of the present embodiment is configured to irradiate the second partial region 22 with light from a direction perpendicular to the direction (azimuth) in which the detection unit 12 irradiates the first partial region 21 with light. The direction in which the second partial region 22 is irradiated with light can be arbitrarily set.

  Further, the camera 13b is constituted by, for example, a CCD camera or a CMOS camera, images the second partial area 22 illuminated by the light source 13a, and obtains image data (video data) of the second partial area 22 obtained thereby. Output. Then, the image (video) obtained by the imaging unit 13 is displayed on the display unit 14 (display 14a).

  The image of the second partial region 22 displayed on the display unit 14 includes the position information of the first partial region 21 as described above. As one method for generating an image of the second partial region 22 having the position information of the first partial region 21, for example, while the light is applied to the first partial region 21 by the detection unit 12, There is a method of imaging the second partial region 22 by irradiating the partial region 22 with light. In this method, only the light from the imaging unit 13 is irradiated on the second partial region 22 other than the first partial region 21, and the first partial region 21 is irradiated with the light from the imaging unit 13 and the light from the detection unit 12. Both are irradiated. Therefore, in the image of the second partial region 22 obtained by the imaging unit 13 and displayed on the display unit 14, as shown in FIG. 4, the brightness of the portion 31 corresponding to the first partial region 21 is other than that (peripheral ) Is greater than the brightness of the portion 32. That is, the brightness difference between the portion 31 corresponding to the first partial region 21 and the other portion 32 can be generated as position information of the first partial region 21.

  FIG. 4 is a diagram illustrating an image of the second partial region 22 displayed on the display unit 14. In the present embodiment, since the second partial region 22 is imaged from the oblique direction by the imaging unit 13, the image of the second partial region 22 displayed on the display unit 14 has a trapezoidal shape. Further, in the image of the second partial region 22 shown in FIG. 4, the brightness of the portion 31 corresponding to the first partial region 21 is larger than the peripheral portion 32 of the portion 31, and therefore the first partial region (measurement region) in the image. Can be visually recognized. Here, the intensity of the light applied to the second partial region 22 by the imaging unit 13 may be smaller than the intensity of the light applied to the first partial region 21 by the detection unit 12. This increases the brightness difference between the portion 31 and the portion 32 in the image of the second partial region 22 displayed on the display unit 14, and makes it easier to visually recognize the position of the first partial region 21 in the image. it can.

  Next, a method for measuring the reflection characteristic of the measurement target surface 20 using the measurement apparatus 10 will be described with reference to FIG. FIG. 5 is a flowchart showing a method for measuring the reflection characteristic of the measurement target surface 20. Each step of the flowchart shown in FIG. 5 can be controlled by the control unit 16.

  In S11, the control unit 16 irradiates the first partial region 21 with the light from the detection unit 12 and irradiates the second partial region 22 with the light from the imaging unit. The imaging unit 13 is caused to capture an image. Then, the image (video) of the second partial region 22 obtained by the imaging unit 13 is displayed on the display unit 14. In S12, the control unit 16 determines whether or not a signal from the user has been detected. If the control unit 16 has not detected a signal from the user, the process returns to S11, and if a signal from the user has been detected, the process proceeds to S13.

  In the processes of S11 and S12, the measurement area (first partial area 21) of the measurement apparatus 10 is located in the target area of the measurement target surface 20 where the user should measure the reflection characteristics based on the image displayed on the display unit 14. In this state, the measuring device 10 is positioned so as to be arranged. For example, when the positioning of the measuring device 10 is completed, the user operates the sensor of the operation unit 15 in order to cause the measuring device 10 to start measuring the reflection characteristics (in this embodiment, press the button 15a). At this time, in the measurement apparatus 10, an output from the sensor (button 15a) is transmitted to the control unit 16, and the control unit 16 detects the output as a signal from the user (a signal input by the operation unit 15). Can do. In the present embodiment, the button 15a is used as the sensor, but the present invention is not limited to this, and a temperature sensor, an optical sensor, or the like for detecting the contact of the user's hand (finger) may be used. In this embodiment, the output of the sensor when the user touches the sensor (when the user presses the button 15a) is used as a signal from the user. However, the present invention is not limited to this, and for example, the output of the sensor when the user releases the sensor (when the user presses the button 15a) may be used as a signal from the user.

  In S <b> 13, the control unit 16 captures the second partial area 22 captured by the imaging unit 13 and displayed on the display unit 14 when the sensor (button 15 a) is operated by the user (when a signal from the user is detected). Are stored in a memory (storage unit). In S <b> 14, the control unit 16 ends (interrupts) the light irradiation to the second partial region 22 by the imaging unit 13 in order to prevent light other than the light from the detection unit 12 from entering the sensor of the detection unit 12. Then, only the light from the detection unit 12 is irradiated to the first partial region 21. And the control part 16 makes the detection part 12 (sensor 12d) detect the light reflected in the 1st partial area | region 21. FIG. FIG. 6 is a diagram illustrating an image of the second partial region 22 obtained by the imaging unit 13 in a state where only the light from the detection unit 12 is applied to the first partial region 21. The image of the second partial region 22 obtained in this way may be displayed on the display unit 14 or may not be displayed. Here, when the measuring device 10 includes a plurality of detection units 12, the control unit 16 irradiates light to the first partial region 21 and detects light reflected by the first partial region 21. Are sequentially performed by each detection unit 12.

  In S15, the control unit 16 obtains the reflection characteristics of the first partial region 21 based on the detection result of the detection unit 12 (intensity distribution data of the reflected light output from the sensor 12d). At this time, the control unit 16 stores the obtained reflection characteristic in the memory in association with the image of the second partial region 22 stored in the memory in S13. As a result, the user can easily grasp which region on the surface to be measured is the reflection property stored in the memory. In S16, the control unit 16 displays a value indicating the reflection characteristic obtained in S15 on the display unit. At this time, the control unit 16 may superimpose the image of the second partial region 22 stored in the memory in S13 and the value indicating the reflection characteristic on the display unit 14 or display only the value indicating the reflection characteristic. You may display on the display part 14. FIG. In the latter case, the control unit 16 displays an image of the second partial region 22 on the display unit 14 before detecting a signal from the user, and after detecting the signal from the user, the value indicating the reflection characteristic. Is displayed on the display unit 14. That is, the control unit 16 switches (i.e., selectively) the image of the second partial region 22 and the value indicating the reflection characteristic on the display unit 14 according to a signal from the user.

  Although the measurement of one reflection characteristic is completed by such a process, the control unit 16 returns to S11 after a predetermined time (for example, 3 seconds), and the second part obtained by the imaging unit 13 is obtained. The image (video) in the region 22 is displayed on the display unit 14. Thereby, the user can continue to measure the reflection characteristics of the measurement target surface 20.

  As described above, the measurement apparatus 10 of the present embodiment images the second partial region 22 including the first partial region 21 where the reflection characteristic is measured, in the region of the measurement target surface 20 where the opening 17 is located. Then, the image of the second partial region 22 obtained thereby is displayed on the display unit 14. In addition, the image of the second partial area 22 displayed on the display unit 14 has position information of the first partial area 21. Thereby, since the user can easily visually recognize the measurement area by the display unit 14, the first partial area 21 (measurement area) is arranged in the target area of the measurement target surface 20 where the reflection characteristics are to be measured. In addition, the measuring device 10 can be easily positioned.

  Here, the measurement apparatus 10 of the present embodiment starts measuring the reflection characteristics in response to detecting the output from the button 15a of the operation unit 15 as a signal from the user, but is not limited thereto. For example, reflection characteristics are measured in response to detection of a signal from a user sent (received) from a device (for example, an information processing device) arranged outside the housing 11 via a cable or wireless. May start. In this case, the control unit 16 detects a signal input from an input unit (such as a keyboard or a mouse) of the device as a signal from the user. Moreover, although the measuring apparatus 10 of this embodiment matched and memorize | stored the image of the 2nd partial area | region 22, and the value which shows reflection characteristics in the control part 16 (memory), it is not restricted to it. For example, the image of the second partial region and the value of the reflection characteristic may be transmitted in association with each other via a cable or wirelessly to a device arranged outside the housing 11 and stored in the device. Thus, the device arranged outside the housing 11 may be one of the components in the measuring device 10.

  Furthermore, in this embodiment, the display 14a provided in the housing 11 is used as the display unit 14 that displays the image of the second partial region 22 obtained by the imaging unit 13. 11 may be used as a display unit. In this case, the control unit 16 transmits the image data of the second partial region 22 obtained by the imaging unit 13 to the external display via a cable or wirelessly and displays the image data on the external display. Thus, the external display provided outside the housing 11 may be one of the components in the measuring device 10.

Second Embodiment
A measuring device according to a second embodiment of the present invention will be described. In the measurement apparatus 10 of the first embodiment, the second partial region 22 is imaged from the oblique direction by the imaging unit 13 and the image obtained thereby is displayed on the display unit 14 as it is, so as shown in FIG. The image of the second partial area 22 displayed on the display unit 14 has a trapezoidal shape. In the present embodiment, geometric image conversion is performed on a trapezoidal image obtained by imaging the second partial region 22 from an oblique direction by the imaging unit 13, and the image subjected to the image conversion is displayed on the display unit. An example displayed in FIG. Since the other configuration is the same as that of the first embodiment, the description is omitted here.

  In the following, an image obtained by imaging the second partial region 22 at an imaging angle β of 45 degrees by the imaging unit 13 is obtained as if the second partial region 22 was captured at an imaging angle β of 0 degree ( For example, an image conversion method for converting into a rectangular image) will be described. The image conversion can be performed by the control unit 16 (processing unit).

The control unit 16 performs coordinate transformation by applying projective transformation to the image data obtained by the imaging unit 13. The projective transformation is one of coordinate transformations applied when correcting a distorted quadrilateral image into a rectangular (square or rectangular) image. In the image data, assuming that the coordinates before conversion are (x, y) and the coordinates after conversion are (x ′, y ′), the coordinates after conversion can be obtained by Expression (1). Here, h _{11 to} h ₃₃ are conversion coefficients obtained from the coordinates of the four points before conversion and the coordinates of the four points after conversion.

  Next, the control unit 16 performs pixel interpolation of the image that has undergone coordinate transformation by projective transformation. When an image is converted geometrically, it is necessary to perform so-called pixel interpolation that performs image filter processing that refers to luminance values between pixels to compensate for pixel data corresponding to a gap. Here, pixel interpolation is performed by further applying bilinear interpolation to the image data subjected to the projective transformation in the control unit 16. Bilinear interpolation is one of linear interpolations for linearly interpolating using 2 × 2 pixels (4 pixels) around the coordinates (x ′, y ′) of the pixel to be supplemented to obtain a luminance value. .

  In this manner, geometric image conversion (coordinate conversion using projective conversion and pixel interpolation using bilinear interpolation) is performed on the image of the second partial region 22 obtained by the imaging unit 13. Thereby, the trapezoidal image as shown in FIG. 4 can be converted into a rectangular image as shown in FIG. 7 and displayed on the display unit 14. FIG. 7 is a diagram illustrating an image of the second partial region 22 displayed on the display unit 14 after performing geometric image conversion on the image of the second partial region 22 obtained by the imaging unit 13. is there.

  Here, in the present embodiment, projective transformation is used as coordinate transformation in geometric image transformation, but the present invention is not limited to this. For example, when coordinate transformation is performed by parallel movement and linear transformation, affine transformation or the like can be used. In this embodiment, bilinear interpolation is used as pixel interpolation, but nearest neighbor interpolation or the like can also be used. Nearest-neighbor interpolation is a method of referring to the luminance value of the pixel closest to the position of the pixel to be interpolated. Although the pixel data to be interpolated has a luminance value different from that of bilinear interpolation, bilinear interpolation and Similarly, pixel interpolation can be performed. Furthermore, in this embodiment, the example which performs geometric image conversion with respect to the image obtained by imaging the 2nd partial area | region 22 with the imaging angle 13 of 45 degree | times by the imaging part 13 was demonstrated. However, the present invention is not limited thereto, and an image similar to the image shown in FIG. 7 can be obtained by performing the above-described geometric image conversion on an image obtained by imaging at an imaging angle β other than 45 degrees. it can.

  As described above, in the present embodiment, geometric image conversion is performed on the image of the second partial region 22 obtained by the imaging unit 13, and the image obtained thereby is displayed on the display unit 14. Thereby, the visibility of the measurement area | region (1st partial area | region 21) by a user can further be improved.

<Third Embodiment>
A measurement apparatus according to a third embodiment of the present invention will be described. In the first embodiment, as one method for generating an image of the second partial region 22 having the position information of the first partial region 21, the second partial region is irradiated while irradiating the first partial region 21 with light by the detection unit 12. A method for imaging 22 has been described. In the present embodiment, as shown in FIG. 8, the mark 33 indicating the position of the first partial region 21 is displayed so as to overlap the image of the second partial region 22 obtained by the imaging unit 13. A method for generating an image of the second partial area 22 having the position information of the area 21 will be described. Since the other configuration is the same as that of the first embodiment, the description is omitted here.

  First, one example of a method for displaying the mark 33 indicating the position of the first partial region 21 will be described. The position of the first partial region 21 in the second partial region 22 does not normally change even if the target region whose reflection characteristics are to be measured is changed. Therefore, the position on the display unit 14 where the first partial region 21 is to be displayed is obtained in advance, and the image of the second partial region 22 obtained by the imaging unit 13 is displayed on the display unit 14. The mark 33 may be superimposed and displayed at the obtained position on the display unit 14. In this case, the imaging unit 13 may not image the second partial region 22 while irradiating the first partial region 21 with the detection unit 12. That is, the imaging unit 13 does not irradiate the first partial region 21 with the light by the detection unit 12, but only irradiates the second partial region 22 with the imaging unit 13, and sets the second partial region 22. You may image.

  Here, the mark 33 indicating the position of the first partial region 21 includes, for example, a mark indicating the outer shape (contour) of the first partial region 21, but other marks such as marks indicating the four corners of the first partial region 21, for example. Marks may be included. Further, without using the mark indicating the position of the first partial region 21, the position of the first partial region 21 is emphasized, for example, by increasing or decreasing the luminance value of the first partial region 21 from the surroundings. A technique may be used. The same applies to the following examples.

  Next, another example of a method for displaying the mark 33 indicating the position of the first partial region 21 will be described. Here, the position of the first partial region 21 in the second partial region 22 is obtained from an image obtained by imaging the second partial region 22 while irradiating the first partial region 21 with light by the detection unit 12. An example in which the mark 33 indicating the position is displayed on the display unit 14 will be described. Below, the method of calculating | requiring the external shape (contour) of the 1st partial area 21 by the control part 16 as a position of the 1st partial area 21 is demonstrated.

  The control unit 16 extracts the first partial region 21 by applying contour extraction to the image data obtained by the imaging unit 13. Contour extraction is one of the image processes applied when extracting the location where the brightness | luminance of a pixel changes discontinuously based on the result of having calculated the brightness | luminance gradient of the pixel in image data. Here, a method for extracting a contour by performing a first-order differentiation by taking a difference between adjacent pixels in the X direction and the Y direction of pixels in image data will be described, but there are various methods for contour extraction. For example, it is possible to perform contour extraction that does not depend on directionality by performing quadratic differentiation in four directions of up, down, left, and right with respect to the target pixel of contour extraction.

  In image data, assuming that a pixel at coordinates (x, y) is a target pixel for contour extraction and the luminance value of the pixel is obtained by f (x, y), a differential value fx in the X direction and a differential value in the Y direction. fy can be obtained by equation (2). Further, from the differential values fx and fy obtained by the equation (2), the contour strength I at the coordinates (x, y) can be calculated using the equation (3). Accordingly, the control unit 16 can extract the first partial region 21 using the contour strength I calculated by the expression (3), and the mark 33 indicating the position of the extracted first partial region 21 is displayed. It can be displayed on the display unit 14.

  As described above, in the present embodiment, the mark 33 indicating the position of the first partial region 21 in the second partial region 22 is superimposed on the image of the second partial region 22 obtained by the imaging unit 13 on the display unit 14. indicate. Thereby, the visibility of the measurement area | region (1st partial area | region 21) by a user can further be improved.

  As mentioned above, although preferred embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

10: measuring device, 11: housing, 12: detection unit, 13: imaging unit, 14: display unit, 15: operation unit, 16: control unit (processing unit), 20: surface to be measured, 21: first part Region 22: second partial region

Claims (13)

A measuring device that has a housing in which an opening is formed and measures reflection characteristics of a surface through the opening,
An imaging unit provided in the housing and imaging the surface through the opening;
A detection unit for detecting reflected light from the surface in a part of a region imaged by the imaging unit;
A processing unit for obtaining reflection characteristics of the surface in the part based on detection by the detection unit;
A display unit for displaying an image of the region obtained by the imaging unit;
Including
The image of the area displayed by the display unit includes information indicating the part of the area.   The measurement apparatus according to claim 1, wherein the display unit displays the reflection characteristic obtained by the processing unit. Including an input unit operated by the user,
The measurement apparatus according to claim 1, wherein the processing unit obtains the reflection characteristic based on a signal input from the input unit. Including an input unit operated by the user,
The processing unit selectively displays the reflection characteristic and an image of the region obtained by the imaging unit on the display unit based on a signal input by the input unit. Item 4. The measuring device according to any one of Items 1 to 3.   5. The measurement apparatus according to claim 1, wherein the processing unit stores the image of the region displayed by the display unit and the reflection characteristic in association with each other. The detector detects light reflected from the surface by irradiating the surface of the part with light.
The imaging unit captures an image of the region including the information by irradiating the region with light in a state where light is applied to the surface of the part by the detection unit. The measuring device according to claim 1, wherein the measuring device is obtained.   The said imaging part irradiates the said area | region with the light of the intensity | strength smaller than the intensity | strength of the light irradiated by the said detection part on the said surface in the said part, The said area | region is imaged. Measuring device.   The measurement apparatus according to claim 1, wherein an image of the region displayed by the display unit includes a mark indicating the part as the information.   The measuring device according to claim 8, wherein the mark includes a mark indicating the partial outer shape.   The measurement apparatus according to claim 1, wherein the display unit includes a display provided in the housing. Including an input unit operated by the user,
The measurement apparatus according to claim 1, wherein the display unit and the input unit are provided adjacent to each other on the housing. An input unit operated by a user;
A gripping part gripped by a user,
The measurement apparatus according to claim 1, wherein the input unit and the grip unit are provided adjacent to each other on the housing.   The measuring apparatus according to claim 1, wherein the reflection characteristic includes at least one of specular gloss, haze, DOI, and image clarity.